Features:
Virtual 5.1 USB sound card
Supports 3-dimensional sound
With no external drivers required
For a failed audio card in a laptop
Compensates any desktop speakers with 3.5 mm cable
Boosts the signal of your headset, speakers, or microphone
No existing sound card required, works completely independently
No additional power required, completely powered by the USB port
Solve the differences in PC hardware characteristics, reduce the number of conversions from analog to digital, and reduce signal distortion.

Other Reference:
1. USB universal bus single interface, simplify the connection method, plug and play easy to use;
2. Support WAV / MP3/ WMA / MPEG1(VCD) / MPEG2 SVCD) / AVI / DVD_Audio / DVD_AC3 / DVD_DTS / DiVX format files;
3. Adopt advanced Xear 3D technology, support MS DirectX, EAX1.0/2.0, HRTF 3DX functions.

Specifications:
Color: Blue
Applies to: 3.5mm jacks
Dimension: 5 x 2.2 x 1.2cm
Material: Plastic Shell; Electronic Parts
Weight: approx. 0.25oz/pc
Pakcage content: 3 x Audio Sound Adapter
PACKAGE - 3 x External 5.1 Channel USB 3D Audio Sound Card, Blue.
FUNCTION - Instantly creates microphone in and audio out jack from any PC USB port.
FEATURE - Multi-channel technology, strong virtual 5.1 channel dynamic sound effect.
COMPATIBILITY - The External USB 2.0 Sound Card Adapter can work with all major operation systems.
DIFFERENCE NOTICE - Please allow 1-3mm measurement difference due to manual measurement and a certain degree of color difference caused by camera lenses, different phone screens, and different monitors.